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JP2004322894A - Roof member for operator's cab of working machine - Google Patents

Roof member for operator's cab of working machine Download PDF

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Publication number
JP2004322894A
JP2004322894A JP2003121548A JP2003121548A JP2004322894A JP 2004322894 A JP2004322894 A JP 2004322894A JP 2003121548 A JP2003121548 A JP 2003121548A JP 2003121548 A JP2003121548 A JP 2003121548A JP 2004322894 A JP2004322894 A JP 2004322894A
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Japan
Prior art keywords
roof member
cab
working machine
machine according
sound absorbing
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JP2003121548A
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Japanese (ja)
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JP4183549B2 (en
Inventor
Kanichi Sato
寛一 佐藤
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Komatsu Ltd
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Komatsu Ltd
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Priority to JP2003121548A priority Critical patent/JP4183549B2/en
Priority to US10/816,488 priority patent/US20040212221A1/en
Priority to IT000753A priority patent/ITMI20040753A1/en
Priority to CN2004100369050A priority patent/CN1540111B/en
Priority to GB0703757A priority patent/GB2432810B/en
Priority to GB0408972A priority patent/GB2400814B/en
Priority to DE102004019884A priority patent/DE102004019884B4/en
Priority to KR1020040028420A priority patent/KR20040093044A/en
Publication of JP2004322894A publication Critical patent/JP2004322894A/en
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Publication of JP4183549B2 publication Critical patent/JP4183549B2/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B29C44/1209—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements by impregnating a preformed part, e.g. a porous lining
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C13/00—Other constructional features or details
    • B66C13/52—Details of compartments for driving engines or motors or of operator's stands or cabins
    • B66C13/54—Operator's stands or cabins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/06—Fibrous reinforcements only
    • B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
    • B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/882—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding
    • B29C70/885—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced partly or totally electrically conductive, e.g. for EMI shielding with incorporated metallic wires, nets, films or plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
    • B60J7/00—Non-fixed roofs; Roofs with movable panels, e.g. rotary sunroofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D25/00—Superstructure or monocoque structure sub-units; Parts or details thereof not otherwise provided for
    • B62D25/06—Fixed roofs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D29/00—Superstructures, understructures, or sub-units thereof, characterised by the material thereof
    • B62D29/04—Superstructures, understructures, or sub-units thereof, characterised by the material thereof predominantly of synthetic material
    • B62D29/043—Superstructures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D33/00—Superstructures for load-carrying vehicles
    • B62D33/06—Drivers' cabs
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/16—Cabins, platforms, or the like, for drivers
    • E02F9/163—Structures to protect drivers, e.g. cabins, doors for cabins; Falling object protection structure [FOPS]; Roll over protection structure [ROPS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3005—Body finishings
    • B29L2031/3011—Roof linings

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Transportation (AREA)
  • Combustion & Propulsion (AREA)
  • Structural Engineering (AREA)
  • Composite Materials (AREA)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Body Structure For Vehicles (AREA)
  • Vehicle Interior And Exterior Ornaments, Soundproofing, And Insulation (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roof member for an operator's cab of a working machine, which roof member can improve measures for protecting an operator and measures for noise, and can reduce a cost, and can improve designability. <P>SOLUTION: The roof member 10 for the operator's cab 1 of the working machine is configured such that the roof member is composed of a member made of foamed plastic material, in which a netlike or clothlike reinforcing material made of high-strength organic fiber or a steel plate is included. By this configuration, the operator can be protected from falling of substances, and the poor circumstances in the operator's cab due to noise, heat, etc. can be improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、油圧ショベルなど建設機械、フォークリフトなどの荷役機械、あるいはトラクタなどの農業機械など、作業機械の運転室屋根部材に関するものである。
【０００２】
【従来の技術】
作業機械、特に作業車両には、油圧ショベルなどの建設機械、トラクタなどの農業機械、その他荷役機械など各種のものがあり、オペレータが搭乗して運転操作を行なうために車体の上方位置に運転室が設けられている。例えば、土砂の移動や掘削作業に使用される建設機械の運転室は、一般的に落下物からオペレータを保護したり、雨・風・埃や周囲の騒音などから守るために、密閉された構造に形成されている。そして、屋根部は、外観をよくする役目を果たすとともに、落下物からオペレータを保護できるものであるとされる。一般に、前記建設機械では、土砂掘削を伴う土木工事や建築基礎工事、あるいは建物の解体などの作業において不整地での作業が多いのと、傾斜地での作業など足場の悪い工事現場での作業において車体が斜めの状態で作業されることから、場合によっては車体が転倒するおそれがある。
【０００３】
このようなことから、車体が転倒して運転室に転倒負荷が作用しても、運転室内の作業者保護がなされるように、運転室のフレームの変形が少ない構造とすることが義務付けられつつある。したがって、この運転室のフレームは頑丈な構造にすることが要求されるため、とりわけ屋根部は補強部材が増えるに従って従来の板金構造では機能性あるいは外観のデザインに満足し得ないものになっている。
【０００４】
このようなことから、例えば特許文献１によって知られるように、屋根部をプラスチック構造体によって形成するものが提案されている。このプラスチック構造体による屋根構造アセンブリでは、運転室の上部部分を包囲して密閉できるようにモールド成形され、運転室の周囲を構成するフレーム部材と結合するためのフランジ部に関連して複数の金属バーが埋め込まれ、かつ前記フランジ部に結合部でのシールを形成する発泡材が一体にモールド成形された構造である。また、このプラスチック構造体による屋根構造アセンブリの前端部分には照明具の受け口が一体に設けられることやプラスチック屋根とすることで塗装をしなくて済み、外観が改善されることが記載されている。
【０００５】
また、運転室を構成する骨組みの鋼製フレームに対して、その周囲を形成する側面パネルと天井を覆う天井パネルとをプラスチック成形品によって構成されるものが特許文献２によって知られている。この先行技術による運転室では、天井パネルとして補強部材に複数の棒鋼を所要の間隔で配するとともに、金網を併用して結合したものをオレフィン系樹脂で一体に成形してなる構成のものを使用されることが記載されている。このほかに、キャノピー本体をプラスチック製にして、その天井部に収納部を一体に形成するものが特許文献３によって知られている。
【０００６】
【特許文献１】
特開平９−２３２６号公報
【特許文献２】
特開平１０−８５００号公報
【特許文献３】
特開２０００−２７３９１０号公報
【０００７】
【発明が解決しようとする課題】
しかしながら、前記特許文献１に開示されている先行技術の屋根構造アセンブリでは、全体をプラスチック成形によって構成するものが記載されているが、屋根（ルーフ）部分をプラスチック材のみで形成する場合、金属フレームへの取付け手段や掴みレール構造，照明具の付加構造などに改善を加えられていても、大きな負荷が作用するような落下物に対しては、耐えられず破壊する恐れがあり、オペレータを保護する目的が充分であるとは言い難い。また、構造的に複雑になってコスト的に高くなるという問題点がある。
【０００８】
また、前記特許文献２によって知られる先行技術では、金属製の補強部材を、ルーフ部分を構成する面に一体にモールドする構成であるから落下物に対する強度は向上して有効であるが、この種の運転室を構成するパネル材としては、気象状況に対する耐候性や騒音などに対して問題がある。例えば密閉構造にされる運転室の外周を覆うパネルとしては、室外から侵入する騒音、特にエンジンや油圧モータの音源に近い運転席では顕著に騒音に対して無防備であり、また室内の空調に対する断熱対策、そして外部からの衝撃に対する強度などを満足させ得ることが要求される。これらに対して、この先行技術にあっては強度的な補強対策を除いて、未だ解決する状態に至っていない。要するに、補強材を一体にモールドするだけでは、強度的に補完できても、作業環境を改善することについて未完の状態にあるという問題点がある。
【０００９】
また、特許文献３によって知られるものでは、ルーフ構成部材をプラスチックで成形するに際して、小物や書類などの収納箇所を設ける程度のもので、作業環境を改善するための対策については何等言及されるに至っていない。
【００１０】
本発明は、このような状況に鑑みてなされたもので、オペレータの保護対策や騒音対策の向上とともに、コストダウンを図ってデザイン性を向上させることができる作業機械の運転室屋根部材を提供することを目的とするものである。
【００１１】
【課題を解決するための手段および作用・効果】
前述された目的を達成するために、第１発明による作業機械の運転室屋根部材は、
作業機械における運転室の屋根部材であって、プラスチック材料を発泡させてなる部材の内部に高強度有機繊維からなる網状または布状の補強材を内包させた構成であることを特徴とするものである。
【００１２】
本発明によれば、機械的強度の高いプラスチック材料で形成されるパネルの内部に高強度繊維のネットまたはクロスを補強材として内在させて、発泡成形することにより、外力に対する強度を高め、発泡によって断熱・遮音の効果を併せ得られるとともに、軽量化でき、成形によって所望の外形に仕上られるので、デザイン性の向上を図ることができるという効果が得られる。もちろん、成形時に所要の部材や部品の一体成形が可能になるので、部品点数を少なくして組立作業性の合理化も図れるという効果が併せ得られる。
【００１３】
また、第２発明による作業機械の運転室屋根部材は、
作業機械における運転室の屋根部材であって、プラスチック材料を発泡させてなる部材の内部に鉄板を補強材として内包させた構成であることを特徴とするものである。
【００１４】
本発明によれば、機械的強度の高いプラスチック材料で形成されるパネルの内部に鉄板を補強材として内在させて、発泡成形することにより、強固なパネルを構成することができ、かつ内在させた鉄板がマスエフェクトによる遮音機能を発揮して騒音を遮音し、併せて発泡層により制振効果および断熱効果が得られることにより、運転室内の環境改善を図ることができるという効果を奏する。
【００１５】
さらに、第３発明による作業機械の運転室屋根部材は、
作業機械における運転室の屋根部材であって、プラスチック材料を発泡させ、運転室の天井面となる側に吸音機能層を形成された構成であることを特徴とするものである。
【００１６】
第３発明によれば、天井面側に吸音層を配して、その吸音層を構成する材料として嵩高性を有する材料を配することにより吸音効果を高めるとともに、天井面の外観にソフト感を醸成するように構成することが可能になり、かつ全体的に発泡樹脂材料によるルーフの外形形成の自由度と相俟って機能性を高めると同時に、外観の意匠効果をも向上させることがでるという効果が得られる。
【００１７】
前記第１発明〜第３発明において、発泡形成させるプラスチック材料は、ポリウレタン樹脂であるのがよい（第４発明）。こうすると、反応射出成形法（低圧成形の一つでＲＩＭ成形法とも言う）が採用できて吸音材を軟質系材料による発泡体で一体に組込むことが容易になり、内部に耐衝撃性の部材を内在させることも容易で、かつ外形を自由に形成できるので、従来問題となっている転倒負荷や落下物に対する強度を確保して、しかも騒音に対する遮音，吸音効果や、断熱効果が併せ得られることになり、デザイン性を高めることができ、かつ、製作に際しても低圧成形法が採用できるので、樹脂型を用いて成形することができ、型費を著しく削減できて従来に較べて大幅なコスト削減を図ることができるという効果が得られる。
【００１８】
また、前記発明において、内包させる高強度有機繊維は、ポリアミドの単繊維、ポリエステル系高強度繊維または炭素繊維のいずれかもしくはそれらの組合せによる網状のもの、または布状のものであるのがよい（第５発明）。このような補強材を用いれば、その構成繊維が成形樹脂との接着性を良好にして成形部が嵩張ることなく、耐貫通性の確保など強化することができるという効果が得られる。
【００１９】
前記発明において、内包させる鉄板は、落下物に対して必要充分な強度をもち、運転室の強度を保つ構成部材より大きい寸法にされているのが好ましい（第６発明）。こうすることで、鉄板の肉厚を許容される範囲で肉厚（薄板ではなく鉄板強度が維持できる、例えば３．２ｍｍ〜４．５ｍｍ）のものにして、運転室構成のフレームと機械的に結合するに便利な寸法に選択することで組立構造を容易にすることができる。また、内包される鉄板に運転室構成フレームとの結合部片を溶接などによって予め付設しておくことができ、成形時の作業性向上を図ることができるという利点がある。
【００２０】
また、前記屋根部材は、天面を上方に向かって凸曲面に形成されて、前記補強材をその曲面に合わせるようにして内包させるのがよい（第７発明）。こうすると、屋根部材は落下物が衝突した瞬間に圧縮応力が発生するようにして耐衝撃性を高めることができ、外観的にも美的効果を高めることができる。
【００２１】
前記第３発明において、吸音機能層には、ポリウレタン発泡体，ポリオレフィン系材料の発泡体，ＰＥＴ繊維，ガラス繊維のいずれか、またはその組合せからなる材料で構成されるのがよい（第８発明）。また、このような吸音機能層の表面側を綿織物，ナイロン織物，不織布など気孔率の大きいシート材で覆うようにするのが好ましい（第９発明）。こうすると、吸音機能層を気孔率の大きいシート材で被うことにより外面、特に運転室内面に装飾性を付与して、吸音効果の向上のみならず環境を改善することができるという効果が得られる。
【００２２】
さらに、前記発明において、前記吸音機能層の表皮は熱可塑性の薄いシート材で覆われる構成であるのがよい（第１０発明）。こうすることによって、表皮部分に、例えばエンボス加工などを施して装飾性と触感を高めることができ、デザイン性を一層向上させ得る。
【００２３】
前記発明において、成形される屋根部材は、運転室の構成フレームとの結合部に締結部片を埋め込み成形しておき、運転室組立時に運転室の構成フレーム側から前記締結部片に締結部材を係合させて一体化できる構成であるのが好ましい（第１１発明）。このように、予め運転室組立用の締結部品をインサート成形しておけば、対応する他方の締結部材を用意するだけで組立ができることになり、作業能率の向上を図ることができる。また、締結部を外部に出さずに纏められることになり、デザイン効果も高められるという利点がある。
【００２４】
前記発明において、内包する補強部材および天井面側に配される吸音材は、発泡樹脂により一体に成形されるのがよい（第１２発明）。また、その屋根部材は、ポリウレタン樹脂の反応射出成形法により成形されたものであるのがよい（第１３発明）。こうすると、補強されて耐久性の高い厚肉で所望の外形に形成された屋根部材を、作業機械の使用環境に対応した機能を所有させた形状構造に、簡単に製作することができ、しかも低圧成形法で成形できるから、樹脂型を用いることができて型費を著しく低減でき、コストダウンすることができるという効果を奏する。
【００２５】
さらに、前記発明において、前記屋根部材の天面側には、モールドコート層または塗装シート貼合わせ層が形成されている構成であるのがよい（第１４発明）。このようにされると、低圧成形法で成形された屋根部材の天面にモールドコート層または塗装シート貼合わせ層が一体に形成されて、通常の成形による製品に塗装を施す場合に対して成形品の前処理（離型剤除去、サンディングなど）が不要であり、コストダウンが図れるとともに、当初のままで表面がそのまま維持され、外観装飾を損なうことがない。
【００２６】
【発明の実施の形態】
次に、本発明による作業機械の運転室屋根部材の具体的な実施の形態につき、図面を参照しつつ説明する。
【００２７】
図１には、本発明による屋根部材が適用される作業車両の運転室の一実施形態全体斜視図が示されている。図２には、第１実施形態の屋根部材の縦断面模式図が示されている。
【００２８】
本実施形態の屋根部材が採用される運転室１は、所要の外形寸法になるように構造部材を用いて構成される運転室構成フレーム２の周囲を少なくとも４面のパネルによって囲われて形成され、前記運転室構成フレーム２の上端部を取巻く部材２’上に屋根部材１０を載せて締結部材によって一体に結合され、前記外周側面のパネルには、前面に前窓３が、右側面に作業機側に開口する側面窓４が、後面の上半部に後部窓５が、そして左側面には出入口６とドア７および後半上部の窓８が、それぞれ設けられ、内部の運転席（図示せず）に座ったオペレータが各面の窓から外部視認して作業ができるようにされている。
【００２９】
このようにされる運転室１の上面を覆う屋根部材１０は、前記運転室１の周囲を囲うパネルの上部外形に周縁部が揃うようにして所要肉厚で下記に示されるような構成で成形された発泡樹脂製のパネルとして装着される。
【００３０】
この屋根部材１０を詳しく説明すると、第１の実施形態の屋根部材１０は、図２にその断面を模式図で示されるように、屋根部材としてプラスチック材料を発泡させて所要肉厚の発泡体（基材層１１）にて所要寸法形状のパネルに形成され、そのパネル部分の内部に、全面にわたって高強度有機繊維からなるネットまたはクロスを補強材１３として内包され、周縁部１２を運転室構成フレーム２との結合部位置に合わせて平面にされ、その結合部１４に複数箇所でそれぞれナット１５（本発明の締結部片に相当）を埋設された構成のものである。
【００３１】
ここで屋根部材１０の主体となる発泡体の基材層１１を形成するプラスチックの発泡主材料としては、ポリウレタン樹脂が用いられ、後述するが所要の成形型を用いてＲＩＭ成形法（反応射出成形法）により一体に発泡成形される。また、内包される補強材１３としては、ポリアミドの単繊維（釣り糸のような撚りを掛けない繊維），ポリエステル系の高強度繊維または炭素繊維の単体またはそれらの組合せによる繊維にてネット状またはクロス状に織成されたものが用いられる。
【００３２】
前記補強材１３は、発泡材料内に介在させて一体化させるに際して、屋根部材１０が中央部で天面２０側に膨らむ曲面に形成するにあたり、中央部が上向きに凸曲面となるように塑性変形させたものを用いるようにされる。こうすると、成形される際に肉厚方向に偏在するのが防止されて、パネル部分の肉厚の中間部で平均的に位置し、しかも落下物による衝撃を受けたときも圧縮応力が作用して耐衝撃性を高めることができる。もちろん、上向きに膨らみをもつ形状にされるので、外観の意匠的効果も高められることになる。
【００３３】
次に、図３に示されるのは、第２実施形態の屋根部材の縦断面模式図で、基本構成は前記第１実施形態のものと同様であるが、補強材として鉄板を使用するものである。したがって、前記実施形態と同一もしくは同様の部分については同一の符号を付して詳細な説明を省略する（以下、同様）。
【００３４】
この屋根部材１０Ａは、所要外形寸法にして内部に、運転室構成フレーム２との結合が可能な寸法範囲で補強材１６として鉄板を内包し、発泡樹脂材料で一体に成形された構成である。前記鉄板としては３．２〜４．５ｍｍ厚のものを上向き凸曲面に成形して内在させてある。前記鉄板の板厚は運転室のサイズなどに応じて前記寸法のうちから選択される。このような鉄板を基材層１１に内包した場合は、補強材１６としてより強力に補強されるほか、外部からの騒音を遮音するのに、その質量による遮音効果を高め得る機能を発揮できる。
【００３５】
また、鉄板を内包させるについて、運転室構成フレーム２との結合部１４に配置される複数のナット１５を、予めその配置に合わせて鉄板に溶接などで一体に取り付けるようにすれば、成形時における鉄板のパネル内部への介在位置をそのナット１５によって支えることにより設定を容易にすることができる。なお、この鉄板は、好ましくは透かし孔を設けないで発泡樹脂（基材層１１）に内包させることになるが、その発泡樹脂としてポリウレタンを使用することにより接着性がよく、使用中に剥離することもない。
【００３６】
図４には、屋根部材の内部構成を表わす一部拡大断面図が示されている。この実施形態の屋根部材１０Ｂは、前記補強材１３（１６）や埋設ナット１５とは別に、天井面１７側にモールドコート層１８を形成され、そのモールドコート層１８の内側に適宜厚さで吸音層１９（本発明における吸音機能層に相当）を形成され発泡体（基材層１１）と一体に成形された構成のものである。ここで、吸音層１９を形成する材料としては、ポリウレタン発泡体（実質的に屋根部材を構成する樹脂材），ポリオレフィン系材料の発泡体，ＰＥＴ繊維（ポリエチレンテレフタレート），ガラス繊維などの単体または組合せが採用できる。これらは所要の厚さにして全面的に配置され、発泡樹脂材によって一体化させる。前記吸音層１９として使用される材料では、成形時に適度な気孔を形成することができるとともに、適度な柔軟性を持たせることができるので、吸音機能を発揮して外力を受けても発泡樹脂による成形部分と遊離することなく一体化でき、保形効果を維持できる。なお、前記吸音層１９と発泡体のみの基材層１１との肉厚方向での厚さの割合は、使用される機種ごとの吸音性能，デザイン等の水準に応じて任意設定される（以下同じ）。
【００３７】
このような構成とすることにより、得られる屋根部材１０Ｂは、その天井面１７になる部分が成形型の表面にシボ模様を形成しておくことにより、モールドコート層１８が成形の際にシボ付けされて、シボ模様が付された天井面１７の製品を得ることができ、美的効果のあるものとなる。なお、そのモールドコート層１８を形成する材料としては、熱可塑性エラストマー（熱可塑性ゴム）などが用いられ、模様付けを容易にするとともに、柔軟な触感が得られる表層を形成できる。
【００３８】
図５には、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（１）が示されている。この実施形態の屋根部材１０Ｃでは、前記実施形態の屋根部材１０Ｂにおけるモールドコート層１８に代えて、オレフィン系発泡体で表面にレザー状のシートを持った材料２１（例えば商品名「ぺフ」東レ株式会社製）を配置して、前記材料による吸音層１９と積層して発泡樹脂で一体成形されたものである。
【００３９】
このような構成の屋根部材１０Ｃによれば、天井面１７がレザー状のソフト感を与えて美麗な外面をもつ部材とすることができる。また、レザー状のシート材２１には、他に０．１〜０．６ｍｍ厚さのオレフィン系材料、塩化ビニル（ＰＶＣ）系材料等が使用できる。
【００４０】
図６には、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（２）が示されている。この実施形態の屋根部材では、前記実施形態の屋根部材におけるモールドコート層１８あるいはレザー状のシート材２１に代えて、例えばＰＥＴ繊維による不織布シート２２を天井面１７に位置するように配して、前記材料により構成される吸音層１９と組合せて発泡樹脂（基材層１１）で一体成形されたものである。このようにすれば、不織布シート２２が天井面１７側に位置して繊維による表面を形成するものが容易に得られる。また、不織布シート２２の代わりに綿織物，ナイロン織物等の通気性を持つ布材が使用できる。
【００４１】
図７には、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（３）が示されている。この実施形態の屋根部材１０Ｅは、天面２０（外表面）に鉄板（補強材１６）を配置され、天井面１７側にはモールドコート層１８が配されて基材層１１および吸音層１９と一体に形成された構成のものである。このモールドコート層１８は、前記実施形態のものと同様にされ、同様の効果が得られる。一方、天面２０には鉄板（補強材１６）が配されて、この鉄板が遮音板としての働きをも兼ねるようにされ、かつその表面（天面２０）を塗装して運転室外装を整えるようにできるものである。
【００４２】
図８は、さらに他の実施形態の屋根部材内部構成を表わす断面図（４）が示されている。この実施形態の屋根部材１０Ｆは、天面２０（外表面）に鉄板１６ａを配置され、天井面１７側にはレザー状のシート２１（商品名「ぺフ」東レ株式会社製）が配されて、かつ吸音層１９の内側に補強材１６として鉄板が基材層１１である発泡樹脂に内包されて一体に形成された構成のものである。この構成の屋根部材１０Ｆでは、天面２０を鉄板１６ａで覆われて内部に補強材１６として鉄板が内在され、かつ吸音層１９が設けられているので、前述の実施形態のように天面側では鉄板１６ａがそのまま露出して補強材としての働きと遮音効果が得られ、しかも内在する補強材１６の鉄板がまた強度維持と遮音効果を果たすことになり、より一層効果のある屋根部材とすることができる。また、天井面１７はレザー状のシート材２１で覆われるので、前述のようにソフト感を与えて美麗な内装材の様相を醸し出すことができる。なお、吸音層１９については、前記両鉄板による遮音に加えて吸音効果を一層高めることができ、天井面１７側からの外力に対してクッション性を与える役目を果たす。
【００４３】
さらに、図９には他の実施形態の屋根部材内部構成を表わす断面図（５）が示されている。この実施形態の屋根部材１０Ｇは、天面２０側にモールドコート層１８ａが設けられ、天井面１７側に不織布シート２２を配されて吸音層１９と中間部に鉄板の補強材１６を内包して発泡樹脂材による基材層１１で一体に形成された構成のものである。このようにされる屋根部材１０Ｇでは、天面２０をモールドコート層１８ａによって基材層１１の外表面を覆われるので、予め運転室の塗装に合わせた色調のモールドコート材を用いれば、強固な塗装面を成形によって得られるので、仕上塗装の工程が省かれるとともに、剥離することがないので、長期にわたり外装のメンテナンスの必要性がなくなる。その他については、前述のものと同様の機能性と効果が得られる。また、天面２０側のモールドコート層１８ａに代わり、塗装シートを貼合わせ成形した塗装シート貼合わせ層を設けても同様の効果が得られる。
【００４４】
次に、前述の屋根部材を作成する実施例について説明する。前記屋根部材の成形には、樹脂型を用いて、ＲＩＭ成形機によって成形されるのであり、内包される補強材１３は、図１０（ａ）によって示されるように、高強度有機繊維製のネットまたはクロスの場合には、その周縁部１３ａを成形型（樹脂型）３０の上型３１と下型３２との周縁部に挟み付けて、緊張状態で樹脂材料を注入して成形される。また、補強材１６として鉄板を内包するには、図１０（ｂ）によって示されるように、その鉄板（補強材１６）の外周が成形型３０の内側に収まるようにして、締結部片（例えば埋設されるナット１５）によって周囲を支え、型内部に浮かせた状態で樹脂材料を注入して成形される。なお、補強材１６として鉄板を使用する場合、その鉄板の周縁部を成形型３０の周縁部にて挟み付けて内在させることもある。以下に前記樹脂型による補強材の内包要領に加えて成形される前述のパネルの内部構成に応じた実施例を説明する。
【００４５】
（実施例１）
樹脂型を用い、天面側になる樹脂型面に、予め塗装膜になるウレタン系塗装材料をスプレーにて吹付け、反対側の天井面側になる樹脂型面にはオレフィン系で表面にレザー状の表皮をもつシート（例えば商品名「ペフ」東レ株式会社製）を形状に沿わせて配置する。厚さ４．２ｍｍで幅および長さ寸法は運転室構成フレームに十分乗るサイズの鉄板を、前記型の合わせ面に挟み込んでクランプした。その後、樹脂型に２官能基と３官能基を持つポリウレタン樹脂材料をＲＩＭ成形機にて注入した。注入したポリウレタン樹脂材料が反応硬化を終えてから、型のクランプを解除し、離型した。
ここで得られた屋根部材は、天面側がウレタン系塗装材料によるインモールドコートされ、補強板の鉄板（４．２ｍｍｔ）を内包し、天井面側にはオレフィン系発泡材とレザー状表皮をもった発泡成形の屋根部材である。なお、発泡材（ポリウレタン）の縁部からはみ出す鉄板部分は、運転室構成フレームとの結合部として使用されるように、当該縁部に締結用の孔（ボルト孔もしくはネジ孔）を設けて取付けが容易な構造とされる。
【００４６】
（実施例２）
樹脂型を用い、天面側の樹脂型面に、予め塗装膜であるウレタン系材料をスプレーで吹付け、反対側の天井面側にはＰＥＴ製不織布を貼り、その上に吸音材であるＰＥＴウールをおき、型の合わせ目に４．２ｍｍｔで幅および長さ寸法を運転室構成フレームに支持され結合できる寸法の鉄板を挟み込んでクランプした。次に、樹脂型内に構造用発泡ポリウレタンを注入し、ＲＩＭ成形した。発泡ポリウレタンが反応硬化した後、樹脂型を開き離型した。
ここで得られた屋根部材は、天面側が塗装され、天井面側は不織布で覆われ、その直下に吸音層を持ち、内部を鉄板で補強された構造の屋根部材である。なお、成形部からはみ出す鉄板部には、実施例１と同様に運転室構成フレームとの結合に使用される取付孔部を設けて組立を容易にする。
【００４７】
（実施例３）
樹脂型を用い、天井面側を成形する樹脂型面の表面にＰＥＴ製不織布を貼り、型の合わせ面に鉄板をクランプし、軟質ポリウレタン樹脂の発泡ＲＩＭ成形を予め実施した。これにより軟質発泡ポリウレタンは鉄板および不織布の間で反応硬化してそれぞれが接着されて一体化した。しかる後、天面側の樹脂型表面にウレタン系塗装材料をスプレーにてコーティングし、この樹脂型を先に成形した部分の鉄板の外面側に重ね合わせてクランプし、構造用ポリウレタン樹脂を注入して発泡ＲＩＭ成形を行なった。
これにより得られた屋根部材は、天面側に塗装層（コート層）を持った硬質発泡ポリウレタンにてなり、内部中間には鉄板による耐衝撃部が形成され、天井面側は軟質ポリウレタン樹脂による吸音層とその表皮にＰＥＴ不織布が配された構造の屋根部材である。成形部からはみ出す鉄板部は運転室構成フレームとの締結に使用される。
【００４８】
（実施例４）
樹脂型を用い、天面側になる樹脂型（上型）面に予め塗装膜になるウレタン系塗装材料をスプレーで吹き付け、反対側の天井面側にはオレフィン系で表面にレザー状のシートを持った材料（例えば商品名「ぺフ」東レ株式会社製）を下型の形状に沿わせて設置し、型の合わせ面にポリアミドの単繊維（撚り合わせていない繊維）製のネットを挟み込んで型をクランプした。こうした樹脂型に２官能基と３官能基をもつポリウレタン樹脂材料をＲＩＭ成形機にて注入した。注入されたポリウレタン樹脂材料が反応硬化を終えてから、型のクランプを解除して離型した。
こうして得られた屋根部材は、天面側がウレタン系塗装材料によるインモールドコートされ、内部にポリアミド繊維のネットによる補強材を内包し、天井面側にはオレフィン系発泡体とレザー表皮を持った材料で形成された触感性のある屋根部材を得ることができた。
【００４９】
（実施例５）
樹脂型を用い、天面側の樹脂型（上型）面に、予め塗装膜であるウレタン系材料をスプレーで吹き付け，反対側の樹脂型（下型）面（天井面側）にはＰＥＴ製不織布を貼り込み、その上にＰＥＴウールにてなる吸音材を配置し、型の合わせ面にポリアミドの単繊維（撚り合わせていない繊維）製のネットを挟み込んで型をクランプした。次にこのクランプされた樹脂型に構造用発泡ポリウレタンを注入し、ＲＩＭ成型した。構造用発泡ポリウレタンが反応硬化した後、樹脂型を開き離型した。
ここで得られた屋根部材は、天面がウレタン系材料によるインモールドコートされ、天井面は不織布で覆われ、その内側に吸音層をもち、内部にポリアミド繊維により補強された構造の屋根部材を得ることができる。
【００５０】
（実施例６）
樹脂型を用い、天井面側を成形する樹脂型（下型）の表面にＰＥＴ製不織布を貼り、型の合わせ面にポリアミドの単繊維（撚り合わせていない繊維）製のクロスを置いてその後から鉄板で補強してクランプし、軟質ポリウレタン樹脂の発泡ＲＩＭ成形を予め実施した。これにより軟質発泡ポリウレタンは、ポリアミド単繊維製のクロスおよび不織布の間で反応硬化してそれぞれを接着した。しかる後、補強で使用した鉄板を取外した。次に、天面側の樹脂型（上型）の表面にウレタン系塗装材料をスプレーにてコーティングし、この樹脂型を先ほど成形したポリアミドクロスの面側にクランプし、その型内に構造用ポリウレタン樹脂を注入して発泡ＲＩＭ成形を行った。
これにより得られた屋根部材は、天面側にインモールドコート層を持った硬質発泡ポリウレタン層が形成され、内部に耐衝撃性を備えるポリアミドの単繊維のクロスが内包されて、天井面側に軟質発泡ポリウレタン層内での吸音層と表皮にＰＥＴ不織布からなる屋根部材が得られる。
【００５１】
上述のようにして得られる屋根部材によれば、次のような効果が得られる。
天面側にインモールドコート層を形成することにより、成形状態で塗装された状態にあるので、改めて塗装する必要がなく、塗膜が強固に接着しているので使用によって剥離を起すことがない。また、前記塗装の層が形成されることにより主体となる発泡ポリウレタンの耐候性は全く問題なく使用できる。また、内部に耐衝撃性の部材を内包しているので、落下物による破損防止機能を確保できる。さらに、内部に鉄板を内包させたものでは、特に遮音性も優れ、外部からの騒音侵入を最大で約３ｄｂ下げることができる。また、吸音層を天井面側に備えるようにすることで、従来の板金製ルーフより凡そ最大で２ｄｂ騒音を下げることができる。前記吸音層表面を不織布またはレザー状のシートで覆うことにより、触感性を高め、外観品質を向上させることができる。またさらに、発泡材で成形されるので、断熱性が高まり、運転室内の作業環境の改善に資すること大なるものである。
【００５２】
さらに、本発明によれば、前述のような効果のほかに、従来軟質の吸音材などを貼り合わせ成型する熱可塑性樹脂（例えば、ポリプロピレン）で射出プレス成形が必須であったが、ポリウレタンＲＩＭ成形では低圧成形であるために、射出プレス成形における金型費よりも凡そ１桁少ない型費でもって成形できることになり、製品コストを著しく低減できるという効果が得られるのである。
【００５３】
以上の説明においては、遮音並びに補強効果を高めるために鉄板を内包される場合、上述のように、その全体を発泡層に内在される構成とされるほか、周縁部を発泡層からはみ出して形成される場合には、そのはみ出し部に運転室構成フレームの上端部との結合を容易にする取付孔を設けるようにすることと、そのはみ出し部分の外面を塗装したり、別途カバーで覆うようにして耐久性の確保を図るようにする。また、成形の都合で運転室構成フレームの上端部との結合部分のみを外部にはみ出させるようにして、そのはみ出し部に取付孔を配設するようにしてもよい。また、遮音並びに補強効果を高めるために鉄板を内包させているが、これと同様の効果が得られるものであれば、他の金属板を用いてもよい。
【００５４】
また、前記屋根部材は発泡樹脂で成形されるから、その成形時に基材層（発泡層）の内部に、図示省略するが運転室に付属される部品、例えば照明具の取付部や配線などを埋設して一体成形することができる。こうすることで組立時の工数を削減でき、かつでき映えもよくなるなど副次的な効果を奏する。このような構成についても、本発明にかかる技術的範疇に属することは言うまでもない。
【図面の簡単な説明】
【図１】図１は、本発明による屋根部材が適用される作業車両の運転室の一実施形態全体斜視図である。
【図２】図２は、第１実施形態の屋根部材の縦断面を模式的に表わす断面図である。
【図３】図３は、第２実施形態の屋根部材の縦断面を模式的に表わす断面図である。
【図４】図４は、屋根部材の内部構成を表わす一部拡大断面図である。
【図５】図５は、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（１）である。
【図６】図６は、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（２）である。
【図７】図７は、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（３）である。
【図８】図８は、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（４）である。
【図９】図９は、他の実施形態の屋根部材内部構成を表わす一部拡大断面図（５）である。
【図１０】図１０（ａ）および（ｂ）は、本発明による屋根部材の成形時の実施形態を表わす断面図である。
【符号の説明】
１ 運転室
２ 運転室構成フレーム
１０，１０Ａ，１０Ｂ，１０Ｃ，１０Ｄ，１０Ｅ，１０Ｆ，１０Ｇ 屋根部材
１１ 基材層（発泡層）
１２ 周縁部
１３ 補強材（高強度有機繊維）
１４ 結合部
１５ ナット
１６ 補強材（鉄板）
１６ａ 鉄板
１７ 天井面
１８，１８ａ モールドコート層
１９ 吸音層
２０ 天面
２１ レザー状のシート材
２２ 不織布シート
３０ 成形型[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cab roof member of a working machine such as a construction machine such as a hydraulic shovel, a cargo machine such as a forklift, or an agricultural machine such as a tractor.
[0002]
[Prior art]
There are various types of work machines, especially work vehicles, such as construction machines such as hydraulic excavators, agricultural machines such as tractors, and other cargo-handling machines.The operator's cab is located above the vehicle body so that an operator can board and perform driving operations. Is provided. For example, the cabs of construction machinery used for moving soil and excavating work are generally closed structures to protect operators from falling objects and to protect them from rain, wind, dust, and surrounding noise. Is formed. The roof is said to serve to improve the appearance and protect the operator from falling objects. In general, in the construction machine, there are many works on irregular terrain in works such as civil engineering work and building foundation work involving earth and sand excavation, or demolition of buildings, and in work on construction sites with poor scaffolding such as work on slopes. Since the vehicle body is operated in an oblique state, the vehicle body may fall down in some cases.
[0003]
For this reason, even if the vehicle body falls and a falling load acts on the driver's cab, it is obliged that the structure of the driver's cab frame be less deformed so that workers in the driver's cab are protected. is there. Therefore, since the frame of the cab is required to have a sturdy structure, the roof and the conventional sheet-metal structure cannot satisfy the functional or external design, especially as the number of reinforcing members increases. .
[0004]
For this reason, as disclosed in, for example, Japanese Patent Application Laid-Open Publication No. H11-163, there has been proposed an apparatus in which a roof is formed of a plastic structure. In this roof structure assembly made of a plastic structure, a plurality of metal members are molded in such a manner as to enclose and seal the upper portion of the cab, and are connected to a flange portion for joining with a frame member constituting the periphery of the cab. The structure is such that a bar is embedded and a foam material for forming a seal at the joint portion is integrally molded with the flange portion. Also, it is described that the front end portion of the roof structure assembly made of this plastic structure is provided with a receptacle for the lighting fixture integrally and that the plastic roof eliminates the need for painting and improves the appearance. .
[0005]
Japanese Patent Application Laid-Open Publication No. H10-163,067 discloses a frame made of a plastic frame in which a side panel that forms a periphery of the frame and a ceiling panel that covers the ceiling are formed of plastic frames. In the driver's cab according to this prior art, a structure in which a plurality of steel bars are arranged at required intervals on a reinforcing member as a ceiling panel, and a combination of wire bars combined with a wire mesh is formed integrally with an olefin resin is used. Is described. In addition, Patent Literature 3 discloses a device in which a canopy body is made of plastic and a storage portion is integrally formed on a ceiling portion thereof.
[0006]
[Patent Document 1]
JP-A-9-2326
[Patent Document 2]
JP-A-10-8500
[Patent Document 3]
JP 2000-273910 A
[0007]
[Problems to be solved by the invention]
However, in the prior art roof structure assembly disclosed in Patent Document 1, although the whole is formed by plastic molding, a metal frame is formed when the roof (roof) portion is formed only of a plastic material. Even if improvements have been made to the means of attachment to the rail, the grip rail structure, and the additional structure of the lighting fixtures, falling objects that may be subjected to large loads may not be tolerated and may be destroyed, protecting the operator. It is hard to say that the purpose of doing is sufficient. There is also a problem that the structure becomes complicated and the cost becomes high.
[0008]
Further, in the prior art known from Patent Document 2, since a metal reinforcing member is molded integrally with a surface constituting a roof portion, the strength against falling objects is improved and effective. The panel material constituting the driver's cab has problems with respect to weather resistance against weather conditions and noise. For example, a panel that covers the outer periphery of the driver's cab with a closed structure is extremely vulnerable to noise that enters from the outside, especially in the driver's seat close to the sound source of the engine or hydraulic motor, and is thermally insulated against indoor air conditioning. It is required to be able to satisfy the countermeasures and the strength against external impact. On the other hand, this prior art has not yet reached a state of solution except for strong reinforcement measures. In short, there is a problem that even if the reinforcing material can be complemented only by integrally molding the reinforcing material, the work environment is not completely improved.
[0009]
Further, in the technique disclosed in Patent Document 3, when a roof component is formed of plastic, only a place for storing small articles and documents is provided, and no measure is taken to improve the working environment. Not reached.
[0010]
The present invention has been made in view of such a situation, and provides a driver's cab roof member of a working machine capable of improving the protection measures and noise measures for an operator and reducing costs and improving design. It is intended for that purpose.
[0011]
[Means for Solving the Problems and Functions / Effects]
In order to achieve the above-mentioned object, the cab roof member of the working machine according to the first invention is provided with:
A roof member of a driver's cab of a work machine, wherein the member is formed by foaming a plastic material and has a structure in which a mesh-like or cloth-like reinforcing material made of high-strength organic fibers is included. is there.
[0012]
According to the present invention, a net or cloth of high-strength fibers is internally provided as a reinforcing material inside a panel formed of a plastic material having high mechanical strength, and the foam is molded to increase the strength against an external force, thereby forming a foam. In addition to the effects of heat insulation and sound insulation, it is possible to reduce the weight and to obtain a desired outer shape by molding, so that the effect of improving the design can be obtained. Needless to say, since necessary members and components can be integrally formed at the time of molding, the effect of reducing the number of components and rationalizing the assembling workability can also be obtained.
[0013]
The cab roof member of the working machine according to the second invention is
A roof member of an operator's cab of a work machine, wherein the iron plate is included as a reinforcing material inside a member formed by foaming a plastic material.
[0014]
ADVANTAGE OF THE INVENTION According to this invention, a strong panel can be comprised by forming an iron plate as a reinforcing material inside a panel formed of a plastic material with high mechanical strength, and performing foam molding. The steel plate exerts the sound insulation function of the mass effect to shield the noise, and at the same time, the vibration suppression effect and the heat insulation effect are obtained by the foam layer, so that the environment in the driver's cab can be improved.
[0015]
Furthermore, the cab roof member of the working machine according to the third invention is
A roof member of a driver's cab of a working machine, wherein a plastic material is foamed and a sound absorbing function layer is formed on a side serving as a ceiling surface of the driver's cab.
[0016]
According to the third invention, a sound absorbing layer is disposed on the ceiling surface side, and a bulky material is disposed as a material forming the sound absorbing layer, thereby enhancing the sound absorbing effect and providing a soft feeling to the appearance of the ceiling surface. It is possible to enhance the functionality of the roof in combination with the degree of freedom in forming the outer shape of the roof with the foamed resin material, and at the same time to improve the design effect of the appearance. The effect is obtained.
[0017]
In the first to third inventions, the plastic material to be foamed is preferably a polyurethane resin (a fourth invention). This makes it possible to adopt the reaction injection molding method (also known as RIM molding method as one of the low pressure molding methods), so that the sound absorbing material can be easily integrated with a foam made of a soft material, and an impact-resistant member is provided inside. It is also easy to incorporate the inside and the outer shape can be formed freely, so that the strength against falling loads and falling objects, which has been a problem in the past, is secured, and the sound insulation, sound absorbing effect, and heat insulation effect against noise can be obtained at the same time. As a result, the design can be improved, and the low-pressure molding method can be used for the production. Therefore, the molding can be performed using a resin mold, and the cost of the mold can be significantly reduced, and the cost is significantly higher than in the past. The effect that reduction can be achieved is obtained.
[0018]
Further, in the above invention, the high-strength organic fiber to be included is preferably a mesh-like one made of a single fiber of polyamide, a polyester-based high-strength fiber or a carbon fiber, or a combination thereof, or a cloth-like one ( Fifth invention). When such a reinforcing material is used, there is obtained an effect that the constituent fibers have good adhesion to the molding resin, and the molded portion does not become bulky and can be strengthened by securing penetration resistance.
[0019]
In the above invention, it is preferable that the iron plate to be included has a necessary and sufficient strength against a falling object and has a size larger than a component that maintains the strength of the cab (sixth invention). By doing so, the thickness of the iron plate is made to be an allowable range (though the strength of the iron plate can be maintained instead of a thin plate, for example, 3.2 mm to 4.5 mm), and the frame of the operator cab is mechanically connected to the frame. By selecting dimensions convenient for coupling, the assembly structure can be facilitated. In addition, there is an advantage that work pieces at the time of molding can be improved because a joint piece with the cab-constituting frame can be attached in advance to the contained iron plate by welding or the like.
[0020]
Further, it is preferable that the roof member has a top surface formed in a convex curved surface upward, and the reinforcing member is included so as to match the curved surface (a seventh invention). In this case, the roof member generates a compressive stress at the moment when the falling object collides with the roof member, so that the impact resistance can be enhanced and the aesthetic effect can be enhanced in appearance.
[0021]
In the third invention, the sound-absorbing function layer is preferably composed of a material made of any one of a polyurethane foam, a polyolefin-based material foam, PET fiber, and glass fiber, or a combination thereof (eighth invention). . It is preferable that the surface side of such a sound absorbing function layer is covered with a sheet material having a high porosity, such as a cotton fabric, a nylon fabric, and a nonwoven fabric (a ninth invention). In this case, by covering the sound absorbing function layer with a sheet material having a high porosity, the outer surface, in particular, the interior of the driver's cab can be provided with decorativeness, so that not only the sound absorbing effect can be improved but also the environment can be improved. Can be
[0022]
Further, in the above invention, it is preferable that the skin of the sound absorbing function layer is covered with a thin thermoplastic sheet material (a tenth invention). By doing so, for example, embossing or the like can be applied to the skin portion to enhance the decorativeness and tactile sensation, and the design can be further improved.
[0023]
In the above invention, the roof member to be molded is formed by embedding a fastening piece in a coupling portion with a frame of a driver's cab, and a fastening member is attached to the fastening piece from the frame of the driver's cab during assembly of the driver's cab. Preferably, it is configured to be engaged and integrated (eleventh invention). In this way, if a fastening part for assembling the driver's cab is insert-molded in advance, assembly can be performed only by preparing the other corresponding fastening member, and the work efficiency can be improved. In addition, since the fastening portions can be gathered without being exposed to the outside, there is an advantage that the design effect can be enhanced.
[0024]
In the above invention, the reinforcing member to be included and the sound absorbing material disposed on the ceiling surface side are preferably integrally formed of a foamed resin (twelfth invention). Further, the roof member is preferably formed by a reaction injection molding method of a polyurethane resin (a thirteenth invention). This makes it possible to easily manufacture a reinforced, durable, thick-walled roof member having a desired outer shape into a shape structure having functions corresponding to the working environment of the working machine, and Since molding can be performed by the low-pressure molding method, a resin mold can be used, so that the cost of the mold can be significantly reduced and the cost can be reduced.
[0025]
Furthermore, in the above invention, it is preferable that a mold coat layer or a paint sheet bonding layer is formed on a top surface side of the roof member (a fourteenth invention). By doing so, a mold coat layer or a paint sheet laminating layer is integrally formed on the top surface of the roof member formed by the low pressure molding method, and the molding is performed in a case where the product is applied by a normal molding. Pretreatment of the product (removal of release agent, sanding, etc.) is not required, cost can be reduced, and the surface can be maintained as it is, without damaging the external decoration.
[0026]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, specific embodiments of the cab roof member of the working machine according to the present invention will be described with reference to the drawings.
[0027]
FIG. 1 is an overall perspective view of an operator's cab of a work vehicle to which a roof member according to the present invention is applied. FIG. 2 is a schematic longitudinal sectional view of the roof member according to the first embodiment.
[0028]
The operator's cab 1 in which the roof member of the present embodiment is adopted is formed by surrounding an operator's cab configuration frame 2 configured by using structural members so as to have required external dimensions with at least four panels. The roof member 10 is placed on a member 2 'surrounding the upper end of the driver's cab frame 2 and integrally joined by a fastening member. A side window 4 opening to the machine side, a rear window 5 in the upper half of the rear surface, an entrance 6 and a door 7 and a window 8 in the upper rear half are provided on the left side, respectively. The operator sitting on the front panel can perform work while visually recognizing the outside from the windows on each side.
[0029]
The roof member 10 that covers the upper surface of the operator cab 1 thus formed is formed with a required thickness so that the peripheral portion is aligned with the upper outer shape of the panel surrounding the operator cab 1 and has the following configuration. It is mounted as a panel made of foamed resin.
[0030]
The roof member 10 will be described in detail. The roof member 10 according to the first embodiment is formed by foaming a plastic material as a roof member as shown in FIG. A panel having a required size and shape is formed by the base material layer 11), and a net or cloth made of high-strength organic fiber is included as a reinforcing material 13 over the entire surface inside the panel portion. The connection portion 14 has a configuration in which the nut 15 (corresponding to a fastening portion of the present invention) is buried at a plurality of positions in the connection portion 14 at a plurality of positions.
[0031]
Here, a polyurethane resin is used as a foaming main material of the plastic forming the base material layer 11 of the foam which is a main component of the roof member 10. As will be described later, a RIM molding method (reaction injection molding) is performed using a required molding die. Method) and are integrally foamed. As the reinforcing material 13 to be included, a single fiber of polyamide (a fiber that is not twisted such as a fishing line), a high-strength fiber of polyester or a fiber of carbon fiber alone or a combination thereof is used to form a net or cloth. What is woven in the shape is used.
[0032]
When the reinforcing member 13 is interposed in the foamed material and integrated, the roof member 10 is plastically deformed so that the central portion has an upwardly convex curved surface when the roof member 10 is formed into a curved surface bulging toward the top surface 20 at the central portion. It is made to use what was made. This prevents uneven distribution in the thickness direction during molding, and is positioned evenly in the middle part of the thickness of the panel portion, and compressive stress acts even when subjected to an impact due to a falling object. And the impact resistance can be increased. Of course, since the shape has a bulge upward, the design effect of the appearance can be enhanced.
[0033]
Next, what is shown in FIG. 3 is a vertical cross-sectional schematic view of the roof member of the second embodiment, which has the same basic configuration as that of the first embodiment, but uses an iron plate as a reinforcing material. is there. Therefore, the same reference numerals are given to the same or similar parts as in the above-described embodiment, and the detailed description is omitted (the same applies hereinafter).
[0034]
The roof member 10A has a required outer dimension, and has a configuration in which an iron plate is included as a reinforcing member 16 within a dimension range in which the roof member 10A can be coupled to the cab frame 2, and is integrally formed of a foamed resin material. As the iron plate, a 3.2-4.5 mm thick iron plate is formed into an upwardly convex curved surface and is internally provided. The thickness of the iron plate is selected from the above-mentioned dimensions according to the size of the driver's cab. When such an iron plate is included in the base material layer 11, it can be reinforced more strongly as the reinforcing material 16, and at the same time, it can exhibit the function of increasing the sound insulation effect due to its mass to shield external noise.
[0035]
Further, with respect to the inclusion of the iron plate, if a plurality of nuts 15 arranged in the joint portion 14 with the cab configuration frame 2 are integrally attached to the iron plate in advance by welding or the like in accordance with the arrangement, it is possible to form the steel plate during molding. Setting can be facilitated by supporting the position of the iron plate inside the panel with the nut 15. In addition, this iron plate is preferably included in a foamed resin (base layer 11) without providing a watermark hole. However, by using polyurethane as the foamed resin, the iron plate has good adhesiveness and peels off during use. Not even.
[0036]
FIG. 4 is a partially enlarged cross-sectional view showing the internal configuration of the roof member. In the roof member 10B of this embodiment, a mold coat layer 18 is formed on the ceiling surface 17 side separately from the reinforcing material 13 (16) and the buried nut 15, and sound absorption is performed inside the mold coat layer 18 with an appropriate thickness. It has a configuration in which a layer 19 (corresponding to the sound absorbing function layer in the present invention) is formed and is integrally formed with the foam (base layer 11). Here, as a material for forming the sound absorbing layer 19, a polyurethane foam (a resin material substantially constituting a roof member), a foam of a polyolefin-based material, PET fiber (polyethylene terephthalate), glass fiber, or the like, alone or in combination Can be adopted. These are arranged in the required thickness over the entire surface and are integrated with the foamed resin material. In the material used as the sound absorbing layer 19, appropriate pores can be formed at the time of molding and appropriate flexibility can be provided. It can be integrated with the molded part without being separated, and the shape retaining effect can be maintained. The ratio of the thickness in the thickness direction between the sound absorbing layer 19 and the base material layer 11 made of only the foam is arbitrarily set according to the level of sound absorbing performance, design, and the like for each model to be used (hereinafter, referred to as the following). the same).
[0037]
By adopting such a configuration, the obtained roof member 10B has a surface which becomes the ceiling surface 17 having a grain pattern formed on the surface of the molding die. As a result, it is possible to obtain a product of the ceiling surface 17 with the grain pattern, which has an aesthetic effect. As a material for forming the mold coat layer 18, a thermoplastic elastomer (thermoplastic rubber) or the like is used, and it is possible to form a surface layer that facilitates patterning and provides a soft touch.
[0038]
FIG. 5 is a partially enlarged cross-sectional view (1) showing an internal configuration of a roof member according to another embodiment. In the roof member 10C of this embodiment, instead of the mold coat layer 18 in the roof member 10B of the above embodiment, a material 21 having a leather-like sheet on the surface thereof made of an olefin-based foam (for example, a product name “@F” Toray) (Manufactured by Co., Ltd.), and laminated with the sound absorbing layer 19 made of the above-mentioned material and integrally molded with foamed resin.
[0039]
According to the roof member 10C having such a configuration, the ceiling surface 17 can be a member having a beautiful outer surface by giving a leather-like soft feeling. In addition, as the leather-like sheet material 21, an olefin-based material, vinyl chloride (PVC) -based material, or the like having a thickness of 0.1 to 0.6 mm can be used.
[0040]
FIG. 6 is a partially enlarged cross-sectional view (2) showing an internal configuration of a roof member according to another embodiment. In the roof member of this embodiment, for example, a nonwoven fabric sheet 22 made of PET fiber is disposed on the ceiling surface 17 instead of the mold coat layer 18 or the leather-like sheet material 21 in the roof member of the above embodiment, It is integrally molded with a foamed resin (base layer 11) in combination with the sound absorbing layer 19 made of the above-mentioned material. In this way, the nonwoven fabric sheet 22 that is positioned on the ceiling surface 17 side and forms a surface made of fibers can be easily obtained. Further, instead of the nonwoven fabric sheet 22, a cloth material having air permeability such as cotton fabric or nylon fabric can be used.
[0041]
FIG. 7 is a partially enlarged cross-sectional view (3) illustrating the internal configuration of the roof member according to another embodiment. In the roof member 10E of this embodiment, an iron plate (reinforcing material 16) is arranged on the top surface 20 (outer surface), and a mold coat layer 18 is arranged on the ceiling surface 17 side, so that the base material layer 11 and the sound absorbing layer 19 It is of a configuration integrally formed. This mold coat layer 18 is made the same as that of the above embodiment, and the same effect is obtained. On the other hand, an iron plate (reinforcing member 16) is arranged on the top surface 20, and this iron plate also serves as a sound insulation plate, and the surface (top surface 20) is painted to prepare the exterior of the cab. Is something you can do.
[0042]
FIG. 8 is a sectional view (4) showing the internal structure of a roof member according to still another embodiment. In the roof member 10F of this embodiment, an iron plate 16a is arranged on a top surface 20 (outer surface), and a leather-like sheet 21 (trade name: "ぺ" is manufactured by Toray Industries, Inc.) is arranged on the ceiling surface 17 side. Further, an iron plate as a reinforcing material 16 is included in the foamed resin as the base material layer 11 and integrally formed inside the sound absorbing layer 19. In the roof member 10F having this configuration, the top surface 20 is covered with the iron plate 16a, and the iron plate is provided inside as the reinforcing member 16 and the sound absorbing layer 19 is provided. In this case, the iron plate 16a is exposed as it is, so that the function as a reinforcing material and the sound insulating effect are obtained, and the iron plate of the reinforcing material 16 existing therein also maintains the strength and the sound insulating effect, so that a more effective roof member is obtained. be able to. In addition, since the ceiling surface 17 is covered with the leather-like sheet material 21, it is possible to give a soft feeling as described above and bring out a beautiful interior material. In addition, the sound absorbing layer 19 can further enhance the sound absorbing effect in addition to the sound insulation by the two iron plates, and plays a role of providing a cushioning property against an external force from the ceiling surface 17 side.
[0043]
FIG. 9 is a sectional view (5) showing the internal structure of a roof member according to another embodiment. The roof member 10G of this embodiment is provided with a mold coat layer 18a on the top surface 20 side, a nonwoven fabric sheet 22 on the ceiling surface 17 side, and a sound absorbing layer 19 and a steel plate reinforcing material 16 in the middle. This is a structure integrally formed with a base material layer 11 made of a foamed resin material. In the roof member 10G thus configured, the top surface 20 is covered with the outer surface of the base material layer 11 by the mold coat layer 18a. Since the painted surface is obtained by molding, the finish painting process is omitted, and since there is no peeling, there is no need for long-term maintenance of the exterior. Otherwise, the same functions and effects as those described above can be obtained. Also, the same effect can be obtained by providing a paint sheet laminating layer formed by laminating a paint sheet instead of the mold coat layer 18a on the top surface 20 side.
[0044]
Next, an embodiment for creating the above-mentioned roof member will be described. The roof member is molded by a RIM molding machine using a resin mold. As shown in FIG. 10 (a), the reinforcing member 13 contained therein is made of a high-strength organic fiber net. Alternatively, in the case of a cloth, the peripheral portion 13a is sandwiched between the peripheral portions of the upper die 31 and the lower die 32 of the molding die (resin die) 30, and the resin material is injected in a tensioned state to be molded. In addition, in order to include an iron plate as the reinforcing member 16, as shown in FIG. 10B, the outer periphery of the iron plate (the reinforcing member 16) fits inside the molding die 30, and the fastening piece (for example, A resin material is injected into the mold while being supported by an embedded nut 15) and floated inside the mold. When an iron plate is used as the reinforcing member 16, the peripheral edge of the iron plate may be sandwiched between the peripheral edges of the molding die 30 to be included therein. Hereinafter, an embodiment according to the internal configuration of the above-described panel formed in addition to the procedure of including the reinforcing material by the resin mold will be described.
[0045]
(Example 1)
Using a resin mold, spray a urethane-based coating material that will become a coating film in advance on the resin mold surface on the top side with a spray, and olefin-based leather on the resin mold side on the opposite ceiling side A sheet having a skin-like shape (for example, “Pef” manufactured by Toray Industries, Inc.) is arranged along the shape. An iron plate having a thickness of 4.2 mm and a width and a length sufficiently large to fit on the cab frame was clamped by being sandwiched between the mating surfaces of the molds. Thereafter, a polyurethane resin material having two functional groups and three functional groups was injected into the resin mold using a RIM molding machine. After the injected polyurethane resin material had completed the reaction curing, the clamp of the mold was released and the mold was released.
The roof member obtained here is in-mold coated with a urethane-based coating material on the top surface, includes an iron plate (4.2 mmt) of a reinforcing plate, and has an olefin-based foam material and a leather-like skin on the ceiling surface. It is a roof member made of foam. In addition, the iron plate portion protruding from the edge of the foam material (polyurethane) is provided with a fastening hole (bolt hole or screw hole) at the edge so as to be used as a connection portion with the cab frame. Is an easy structure.
[0046]
(Example 2)
Using a resin mold, a urethane-based material that is a coating film is sprayed on the resin mold surface on the top side in advance by spraying, and a nonwoven fabric made of PET is pasted on the ceiling side on the opposite side, and PET as a sound absorbing material is placed thereon. The wool was placed, and the width and length dimensions were clamped at 4.2 mmt between the molds by sandwiching an iron plate of a size supported and coupled to the cab frame. Next, the structural polyurethane foam was injected into the resin mold and RIM-molded. After the foamed polyurethane was cured by reaction, the resin mold was opened and released.
The roof member obtained here is a roof member having a structure in which the top surface side is painted, the ceiling surface side is covered with a nonwoven fabric, a sound absorbing layer is provided immediately below, and the inside is reinforced with an iron plate. The iron plate portion protruding from the forming portion is provided with a mounting hole portion used for coupling with the cab frame as in the first embodiment, thereby facilitating assembly.
[0047]
(Example 3)
Using a resin mold, a nonwoven fabric made of PET was adhered to the surface of the resin mold surface on which the ceiling side was molded, an iron plate was clamped to the mating surface of the mold, and foam RIM molding of a soft polyurethane resin was performed in advance. As a result, the flexible foamed polyurethane reacts and hardens between the iron plate and the nonwoven fabric, and is bonded and integrated. After that, the surface of the resin mold on the top side is coated with a urethane coating material by spraying, this resin mold is overlapped on the outer surface side of the iron plate in the previously molded part, clamped, and the structural polyurethane resin is injected. To perform foam RIM molding.
The roof member thus obtained is made of hard foamed polyurethane with a coating layer (coat layer) on the top side, an impact-resistant part is formed in the middle of the inside by an iron plate, and the ceiling side is made of soft polyurethane resin. This is a roof member having a structure in which a PET non-woven fabric is disposed on a sound absorbing layer and its skin. The iron plate part protruding from the forming part is used for fastening to a cab frame.
[0048]
(Example 4)
Using a resin mold, spray a urethane-based coating material that will become a coating film in advance on the resin mold (upper mold) surface on the top side with an olefin-based leather-like sheet on the opposite ceiling side. Place the material you have (for example, the product name "Fu" manufactured by Toray Industries, Inc.) along the shape of the lower mold, and insert a polyamide single fiber (untwisted fiber) net into the mating surface of the mold. The mold was clamped. A polyurethane resin material having two functional groups and three functional groups was injected into such a resin mold using a RIM molding machine. After the injected polyurethane resin material had completed the reaction curing, the mold was released from the clamp and released.
The roof member thus obtained is in-mold coated with a urethane-based coating material on the top side, contains a reinforcing material made of polyamide fiber net inside, and has an olefin-based foam and leather skin on the ceiling side. Thus, a roof member having a tactile feel formed of was obtained.
[0049]
(Example 5)
Using a resin mold, a urethane-based material that is a coating film is sprayed on the resin mold (upper mold) surface on the top side in advance by spraying, and the resin mold (lower mold) surface (ceiling side) on the opposite side is made of PET. A non-woven fabric was stuck, a sound absorbing material made of PET wool was placed on the non-woven fabric, and a polyamide single fiber (untwisted fiber) net was sandwiched between the mating surfaces of the mold to clamp the mold. Next, the foamed structural polyurethane was injected into the clamped resin mold and RIM-molded. After the structural polyurethane foam was reacted and cured, the resin mold was opened and released.
The roof member obtained here is a roof member with a structure in which the top surface is in-mold coated with a urethane-based material, the ceiling surface is covered with a nonwoven fabric, a sound absorbing layer is provided inside, and a polyamide fiber is reinforced inside. Obtainable.
[0050]
(Example 6)
Using a resin mold, apply a PET non-woven fabric to the surface of the resin mold (lower mold) that molds the ceiling side, and place a polyamide single fiber (untwisted fiber) cloth on the mating surface of the mold, and then It was reinforced with an iron plate, clamped, and foamed RIM molding of a soft polyurethane resin was performed in advance. As a result, the flexible foamed polyurethane reacted and cured between the polyamide single-fiber cloth and the nonwoven fabric to bond them. Thereafter, the iron plate used for reinforcement was removed. Next, the surface of the resin mold (upper mold) on the top side is coated with a urethane-based coating material by spraying, and this resin mold is clamped to the surface of the polyamide cloth molded earlier, and the structural polyurethane is placed in the mold. Resin was injected to perform foam RIM molding.
The roof member obtained in this way has a rigid foamed polyurethane layer with an in-mold coat layer formed on the top side, and a polyamide single fiber cloth with impact resistance is included inside, and on the ceiling side A roof member made of a PET non-woven fabric is obtained on the sound absorbing layer and the skin in the soft foamed polyurethane layer.
[0051]
According to the roof member obtained as described above, the following effects can be obtained.
By forming the in-mold coat layer on the top side, it is in the state of being painted in a molded state, so there is no need to apply again, and since the coating is firmly adhered, there is no peeling due to use . Further, the weather resistance of the foamed polyurethane which is the main component by forming the coating layer can be used without any problem. In addition, since a shock-resistant member is included in the inside, a function of preventing damage caused by falling objects can be secured. In addition, a steel plate that includes an iron plate inside is particularly excellent in sound insulation, and can reduce intrusion of noise from outside by about 3 db at the maximum. Further, by providing the sound absorbing layer on the ceiling surface side, it is possible to reduce the noise by about 2 db at the maximum compared to the conventional sheet metal roof. By covering the surface of the sound absorbing layer with a nonwoven fabric or a leather-like sheet, the tactile sensation can be enhanced and the appearance quality can be improved. Furthermore, since it is molded with a foam material, the heat insulating property is enhanced, which greatly contributes to the improvement of the working environment in the cab.
[0052]
Further, according to the present invention, in addition to the above-described effects, injection press molding is conventionally required with a thermoplastic resin (for example, polypropylene) in which a soft sound absorbing material or the like is bonded and molded. Since low-pressure molding is used, molding can be performed with a mold cost that is approximately one digit less than the mold cost in injection press molding, and the effect of significantly reducing product cost can be obtained.
[0053]
In the above description, when an iron plate is included in order to enhance the sound insulation and reinforcement effect, as described above, the entire structure is included in the foam layer, and the peripheral portion is formed by protruding from the foam layer. If this is the case, the protruding portion shall be provided with a mounting hole to facilitate connection with the upper end of the cab frame, and the outer surface of the protruding portion shall be painted or covered with a separate cover. To ensure durability. Further, only the connection portion with the upper end portion of the cab configuration frame may protrude to the outside for convenience of molding, and a mounting hole may be provided in the protruding portion. Although an iron plate is included to enhance the sound insulation and reinforcement effects, other metal plates may be used as long as the same effects can be obtained.
[0054]
In addition, since the roof member is formed of a foamed resin, parts (not shown) attached to the driver's cab, such as a lighting fixture mounting portion and wiring, are formed inside the base material layer (foamed layer) at the time of the formation. It can be embedded and integrally molded. By doing so, it is possible to reduce the number of man-hours at the time of assembling, and to achieve a secondary effect such as an improved appearance. It goes without saying that such a configuration also belongs to the technical category according to the present invention.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of one embodiment of a cab of a work vehicle to which a roof member according to the present invention is applied.
FIG. 2 is a cross-sectional view schematically illustrating a vertical cross section of the roof member according to the first embodiment.
FIG. 3 is a cross-sectional view schematically illustrating a vertical cross section of a roof member according to a second embodiment.
FIG. 4 is a partially enlarged cross-sectional view illustrating an internal configuration of a roof member.
FIG. 5 is a partially enlarged sectional view (1) showing an internal configuration of a roof member according to another embodiment.
FIG. 6 is a partially enlarged cross-sectional view (2) illustrating an internal configuration of a roof member according to another embodiment.
FIG. 7 is a partially enlarged cross-sectional view (3) illustrating an internal configuration of a roof member according to another embodiment.
FIG. 8 is a partially enlarged cross-sectional view (4) illustrating an internal configuration of a roof member according to another embodiment.
FIG. 9 is a partially enlarged cross-sectional view (5) illustrating an internal configuration of a roof member according to another embodiment.
FIGS. 10 (a) and (b) are cross-sectional views showing an embodiment of a roof member according to the present invention during molding.
[Explanation of symbols]
1 cab
2 Operator cab configuration frame
10, 10A, 10B, 10C, 10D, 10E, 10F, 10G Roof member
11 Base material layer (foam layer)
12 Perimeter
13 Reinforcing materials (high-strength organic fibers)
14 Joint
15 nuts
16 Reinforcement (iron plate)
16a iron plate
17 Ceiling surface
18, 18a Mold coat layer
19 Sound absorbing layer
20 Top
21 Leather sheet material
22 Non-woven sheet
30 Mold

Claims (14)

作業機械における運転室の屋根部材であって、プラスチック材料を発泡させてなる部材の内部に高強度有機繊維からなる網状または布状の補強材を内包させた構成であることを特徴とする作業機械の運転室屋根部材。A work machine having a structure in which a mesh member or a cloth-like reinforcing member made of a high-strength organic fiber is included in a member formed by foaming a plastic material, which is a roof member of a driver's cab of the work machine. Driver's cab roof member. 作業機械における運転室の屋根部材であって、プラスチック材料を発泡させてなる部材の内部に鉄板を補強材として内包させた構成であることを特徴とする作業機械の運転室屋根部材。An operator's cab roof member of a working machine, wherein the iron plate is included as a reinforcing material in a member formed by foaming a plastic material. 作業機械における運転室の屋根部材であって、プラスチック材料を発泡させ、運転室の天井面となる側に吸音機能層を形成された構成であることを特徴とする作業機械の運転室屋根部材。An operator's cab roof member of a working machine, wherein the sound absorbing function layer is formed on a side to be a ceiling surface of the operator's cab. 前記発泡形成させるプラスチック材料は、ポリウレタン樹脂である請求項１〜３のいずれかに記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to any one of claims 1 to 3, wherein the plastic material to be foamed is a polyurethane resin. 前記内包させる高強度有機繊維は、ポリアミドの単繊維、ポリエステル系高強度繊維または炭素繊維のいずれかもしくはそれらの組合せによる網状のもの、または布状のものである請求項１に記載の作業機械の運転室屋根部材。The working machine according to claim 1, wherein the high-strength organic fiber to be included is a mesh-like or cloth-like one made of any of polyamide single fiber, polyester-based high-strength fiber, or carbon fiber, or a combination thereof. Driver's cab roof member. 前記内包させる鉄板は、落下物に対して必要充分な強度をもち、運転室の強度を保つ構成部材より大きい寸法にされている請求項２に記載の作業機械の運転室屋根部材。3. The cab roof member of a working machine according to claim 2, wherein the steel plate to be included has a necessary and sufficient strength against falling objects and is larger in size than a component that maintains the strength of the cab. 前記屋根部材は、天面を上方に向かって凸曲面に形成されて、前記補強材をその曲面に合わせるようにして内包させる請求項１〜６のいずれかに記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to any one of claims 1 to 6, wherein the roof member has a top surface formed into a convex curved surface facing upward and includes the reinforcing member so as to match the curved surface. . 前記吸音機能層は、ポリウレタン発泡体，ポリオレフィン系材料の発泡体，ＰＥＴ繊維，ガラス繊維のいずれか、またはその組合せからなる材料で構成される請求項３に記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to claim 3, wherein the sound absorbing function layer is made of a material made of any one of a polyurethane foam, a polyolefin-based material foam, PET fiber, and glass fiber, or a combination thereof. 吸音機能層の表面側を綿織物，ナイロン織物，不織布など気孔率の大きいシート材で覆うようにする請求項８に記載の作業機械の運転室屋根部材。9. The cab roof member of a working machine according to claim 8, wherein a surface side of the sound absorbing function layer is covered with a sheet material having a high porosity such as a cotton fabric, a nylon fabric, and a nonwoven fabric. 前記吸音機能層の表皮は熱可塑性の薄いシート材で覆われる構成である請求項３または８に記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to claim 3 or 8, wherein a skin of the sound absorbing function layer is covered with a thin thermoplastic sheet material. 成形される屋根部材は、運転室の構成フレームとの結合部に締結部片を埋め込み成形しておき、運転室組立時に運転室の構成フレーム側から前記締結部片に締結部材を係合させて一体化できる構成である請求項１〜３のうちのいずれかに記載の作業機械の運転室屋根部材。The roof member to be molded is formed by embedding a fastening piece in a coupling portion with a cab constituent frame, and engaging the fastening member with the fastening piece from the cab constituent frame side during cab assembly. The cab roof member of the working machine according to any one of claims 1 to 3, wherein the cab roof member can be integrated. 前記内包する補強部材および天井面側に配される吸音材は、発泡樹脂により一体に成形される請求項１〜１１のいずれかに記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to any one of claims 1 to 11, wherein the included reinforcing member and the sound absorbing material arranged on the ceiling surface side are integrally formed of a foamed resin. 前記屋根部材は、ポリウレタン樹脂の反応射出成形法により成形されたものである請求項１〜１２に記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to any one of claims 1 to 12, wherein the roof member is formed by a reaction injection molding method of a polyurethane resin. 前記屋根部材の天面側には、モールドコート層または塗装シート貼合わせ層が形成されている構成である請求項１〜１３のいずれかに記載の作業機械の運転室屋根部材。The cab roof member of a working machine according to any one of claims 1 to 13, wherein a mold coat layer or a paint sheet bonding layer is formed on a top side of the roof member.
JP2003121548A 2003-04-25 2003-04-25 Working machine cab roof material Expired - Fee Related JP4183549B2 (en)

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JP2003121548A JP4183549B2 (en) 2003-04-25 2003-04-25 Working machine cab roof material
US10/816,488 US20040212221A1 (en) 2003-04-25 2004-03-31 Cab roof member for work machine
IT000753A ITMI20040753A1 (en) 2003-04-25 2004-04-16 CAB ROOF ELEMENT FOR A WORKING MACHINE
CN2004100369050A CN1540111B (en) 2003-04-25 2004-04-21 Cabin ceiling member of engineering machinery
GB0703757A GB2432810B (en) 2003-04-25 2004-04-22 Cab roof member for work machine
GB0408972A GB2400814B (en) 2003-04-25 2004-04-22 Cab roof member for work machine
DE102004019884A DE102004019884B4 (en) 2003-04-25 2004-04-23 Cabin roof element for a work machine
KR1020040028420A KR20040093044A (en) 2003-04-25 2004-04-23 Roof member of cabin for work implement

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